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HF-PC-204 Capacitive Current Tester
Capacitive Current Tester is specially designed for 6kV to 35kV medium voltage power grids. It adopts the PT secondary measurement approach without direct connection to high-voltage primary circuits to ensure operational safety. Featuring automatic testing, high measuring precision and portable layout, it is widely applied in substations for grid capacitance current detection and grounding scheme selection.
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Capacitive Current Tester is professional portable test equipment dedicated to measuring capacitive earth current of 6~35kV medium-voltage distribution power grids.
It supports multiple PT wiring modes and adopts the neutral point off-frequency injection method to eliminate measurement errors of conventional 4PT connection. Fitted with industrial sunlight-readable color LCD and friendly human-machine interface, it monitors zero-sequence voltage in real time with complete overvoltage and short-circuit protection.
Equipped with digital variable-frequency power source, thermal printing, dual local & USB data storage and real-time clock, the lightweight device ensures safe, accurate and efficient field testing for substations and power maintenance departments.
It supports multiple PT wiring modes and adopts the neutral point off-frequency injection method to eliminate measurement errors of conventional 4PT connection. Fitted with industrial sunlight-readable color LCD and friendly human-machine interface, it monitors zero-sequence voltage in real time with complete overvoltage and short-circuit protection.
Equipped with digital variable-frequency power source, thermal printing, dual local & USB data storage and real-time clock, the lightweight device ensures safe, accurate and efficient field testing for substations and power maintenance departments.
Product Features
- Boasts wider measurement range and much faster testing speed.
- Compatible with 1PT, 3PT and two kinds of 4PT wiring solutions for on-site capacitive current measurement. The capacitor bank neutral point off-frequency signal injection method is applied to fix inaccurate measuring results caused by conventional 4PT connection.
- Adopts industrial-grade 320×240 dot color LCD display with excellent visibility even under intense sunlight.
- User-friendly human-machine interaction design:
- Tips and guidance are provided for key operations and parameter configuration.
- Complete measurement data and parameters can be displayed and printed in detail for later analysis.
- Wiring diagrams of all PT connection modes will be shown on screen to facilitate wiring judgment and cable connection.
- The top status bar shows USB insertion status in real time; warning prompts will pop up if you operate unconnected devices.
- Real-time monitoring and display of zero-sequence 3U0 voltage for system status evaluation; testing will stop automatically when excessive 3U0 voltage is detected.
- Equipped with multi-channel zero-sequence overvoltage protection circuits. Its output terminals can endure AC 100V 50Hz voltage safely without damage.
- Integrated fully digital variable frequency inverter power supply: accurate output frequency, adjustable output current, high efficiency, low heat emission, small volume, light weight and stable long-time running performance.
- Comes with output short-circuit protection.
- Built-in real-time clock to show date and time; each test record is marked with specific test time.
- Dual storage options: local memory and USB flash drive storage. Up to 150 groups of data can be stored locally and exported to USB. USB saved files are Word format, available for direct editing and printing on computers.
- Built-in thermal printer supports fast and noiseless printing.
- Small size and lightweight design, easy to carry for outdoor field tests.
Technical Specifications
| Category | No. | Parameter | Specification |
|---|---|---|---|
| Capacitive & Current Measurement | 1 | Measuring Range | 0.3μF ~ 200μF; 1A ~ 400A |
| 2 | Accuracy | ±(5% of reading + 2 digits) | |
| 3 | Resolution | 0.3~9.999: 0.001 10~99.99: 0.01 100~999.9: 0.1 ≥1000: 1 | |
| 4 | Voltage Level | Continuously adjustable from 0.1kV to 99.9kV | |
| Zero-sequence 3U0 Voltage Measurement | 1 | Measuring Range | 1V ~ 100V, AC 50Hz |
| 2 | Accuracy | ±(1% of reading + 10 digits) | |
| 3 | Resolution | 1~9.999: 0.001 10~99.99: 0.01 | |
| Operating Conditions & Dimensions | 1 | Power Supply | AC 100-240V, 0.8A, 50/60Hz |
| 2 | Instrument Weight | 4.5 kg | |
| 3 | Overall Size | 320mm (L) × 270mm (W) × 150mm (H) | |
| 4 | Operating Temperature | -10℃ ~ 50℃ | |
| 5 | Relative Humidity | ＜90%, non-condensing |
Capacitive Current Tester – FAQ
Q1: What is the main purpose of the Capacitive Current Tester?
A: This tester is professionally developed to measure the capacitive current and capacitance value of 6kV~35kV medium-voltage power grids. It helps engineers evaluate grid insulation conditions and select the optimal grounding compensation scheme accurately.
Q2: What PT connection modes does the device support?
A: It fully supports 1PT, 3PT and two types of 4PT field wiring modes. It also adopts the neutral point off-frequency signal injection method to solve inaccurate measurement problems caused by traditional 4PT connection.
Q3: Is the tester safe for on-site high-voltage testing?
A: Yes. It features real-time zero-sequence 3U0 voltage monitoring and automatic overvoltage stop protection. Built-in multi-level overvoltage protection allows the terminal to withstand AC 100V 50Hz voltage without damage. It also supports output short-circuit protection for maximum field safety.
Q4: Can the device work under strong sunlight?
A: Equipped with an industrial-grade 320×240 color LCD screen, the tester delivers clear visibility under strong sunlight, ensuring smooth outdoor field operation.
Q5: What data storage and output methods are available?
A: It supports dual storage of local memory (150 groups of records) and USB flash drive. USB data is saved in editable Word format for direct computer printing and analysis. A built-in thermal printer supports fast and silent on-site printing.
Q6: Does the instrument display real-time test status and system conditions?
A: Yes. It displays real-time zero-sequence 3U0 voltage, test date and time, USB connection status, and operation prompts. Wiring schematic diagrams are available on screen to avoid connection errors.
Q7: What are the advantages of the built-in digital frequency conversion power supply?
A: It provides accurate output frequency, adjustable current, high efficiency and low heat generation. The compact and lightweight design ensures stable long-time continuous operation for field maintenance.
Q8: What is the working environment requirement?
A: The tester works stably at -10℃~50℃ with relative humidity below 90% (non-condensing). It adopts universal AC 100~240V wide voltage power supply for global use.
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